|About this Abstract
||MS&T23: Materials Science & Technology
||Interface-mediated Phenomena in Structural Materials
||Understanding Dislocation-interface Interactions during Recrystallization of Mg-Ca-Zn Alloys
||Rogine Gomez, Aeriel Leonard
|On-Site Speaker (Planned)
Deformation twinning plays a significant role in the deformation of magnesium alloys due to its limited number of independent slip systems. Twin formation results in increased interfacial energy that leads to the embrittlement of magnesium, making it undesirable for expanded usage in the transportation industry. Alloying with Ca and Zn have been found to mediate twin formation and favor slip due to their ability to weaken crystallographic texture. In this study, the dislocation structure near twin boundaries, near other microstructural interfaces, and inside of twins was observed in Mg-(Ca, Zn) alloys under TEM. It was found that high dislocation density within twin and grain boundaries result in the preferential nucleation of recrystallized grains in these regions. The objective is to understand the influence of dislocation interactions at interfaces associated with deformation twins and grain boundaries on the nucleation of recrystallized grains using a combination of in-situ heating, TEM, and SEM-EBSD.